WO2017165599A1 - Méthodes de détection de bordetella - Google Patents

Méthodes de détection de bordetella Download PDF

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Publication number
WO2017165599A1
WO2017165599A1 PCT/US2017/023735 US2017023735W WO2017165599A1 WO 2017165599 A1 WO2017165599 A1 WO 2017165599A1 US 2017023735 W US2017023735 W US 2017023735W WO 2017165599 A1 WO2017165599 A1 WO 2017165599A1
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nucleic acid
seq
target nucleic
biological sample
primer pair
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PCT/US2017/023735
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English (en)
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Jules Chen
Michelle Tabb
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Quest Diagnostics Investments Llc
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Priority to CN201780031481.4A priority Critical patent/CN109153699A/zh
Priority to EP17771121.5A priority patent/EP3442984B1/fr
Priority to EP22189467.8A priority patent/EP4144867A1/fr
Priority to CA3018843A priority patent/CA3018843A1/fr
Priority to US16/086,714 priority patent/US20190382826A1/en
Priority to BR112018069316A priority patent/BR112018069316A2/pt
Priority to MX2018011625A priority patent/MX2018011625A/es
Publication of WO2017165599A1 publication Critical patent/WO2017165599A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
    • C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
    • C12Q1/6876—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes
    • C12Q1/6888—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for detection or identification of organisms
    • C12Q1/689—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for detection or identification of organisms for bacteria
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
    • A61K31/407—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil condensed with other heterocyclic ring systems, e.g. ketorolac, physostigmine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
    • A61K31/496—Non-condensed piperazines containing further heterocyclic rings, e.g. rifampin, thiothixene or sparfloxacin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/70—Carbohydrates; Sugars; Derivatives thereof
    • A61K31/7042—Compounds having saccharide radicals and heterocyclic rings
    • A61K31/7048—Compounds having saccharide radicals and heterocyclic rings having oxygen as a ring hetero atom, e.g. leucoglucosan, hesperidin, erythromycin, nystatin, digitoxin or digoxin
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q2600/00—Oligonucleotides characterized by their use
    • C12Q2600/106—Pharmacogenomics, i.e. genetic variability in individual responses to drugs and drug metabolism
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q2600/00—Oligonucleotides characterized by their use
    • C12Q2600/158—Expression markers
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q2600/00—Oligonucleotides characterized by their use
    • C12Q2600/16—Primer sets for multiplex assays

Definitions

  • the present disclosure provides methods for determining whether a patient exhibiting pertussis-like symptoms will benefit from treatment with therapeutic agents that inhibit Bordetella hohnesii. These methods are based on detecting Bordetella pertussis, Bordetelh parapertussis, and Bordetella hohnesii in a biological sample by assaying for the presence of the IS481 , IS 1001 , and hIS 1001 target repeat elements, respectively. Kits for use in practicing the methods are also provided.
  • Antibody assays are also used to diagnose Bordetelh sp. by detecting characteristic bacterial antigens. Most commonly, detection of me pertussis toxin protein serves as an indicator of Bordetelh infection. While these antibody-based assays have good sensitivity and specificity, they typically require a sample of the patient's blood, instead of a non-invasivery obtained mucus sample, and require the infection to be in the early and/or convalescent stage. These assays are likely to yield false negative results if the patient sample is not obtained at the appropriate temporal window during disease
  • DFA direct fluorescent antibody
  • the present disclosure provides compositions and methods for detecting and discriminating between multiple related pathogenic Bordetelh species ⁇ i.e., B. pertussis, B. parapertussis, and B. hohnesii) in a biological sample.
  • the methods and compositions of the present technology are useful in selecting an optimal therapeutic regimen for a subject exhibiting pertussis-like symptoms. It is contemplated that the methods disclosed herein allow for rapid, sensitive and simultaneous detection of one or more target nucleic acid sequences corresponding to the IS481, IS 1001, and hIS1001 multicopy insertion sequences (IS). Detection of the IS481, IS 1001, and hIS 1001 repeat elements in a biological sample is useful in determinmg the presence of B.
  • the therapeutic regimen comprises one or more of fluoroquinolones, carbapenems, trimemoprim-sulfamethoxazole, B. hohnesii-speciSc antibodies, whole-cell (wP) B. pertussis vaccine, acellular B. pertttssis vaccine, telithromycin and macrohde-antibiotics .
  • the methods of the present technology may be practiced on unprocessed biological samples, resulting in a direct, streamlined sample-to-result process.
  • the present disclosure provides a method for detecting the presence of at least one pathogenic Bordetelh species in a biological sample comprising: (a) contacting the biological sample with: (i) a first primer pair that amplifies an IS481 target nucleic acid comprising nucleotides that are at feast 85-95% identical to SEQ ID NO: 1 or a complement thereof; (ii) a second primer pair that amplifies an IS 1001 target nucleic acid comprising nucleotides that are at feast 85-95% identical to SEQ ID NO: 2 or a complement thereof; and (in) a third primer pair that amplifies a his 1001 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 3 or a complement thereof to produce a reaction-sample mixture under conditions where amplification of the IS481 , IS 1001 , and hIS 1001 target nucleic acids, if present in the biological sample, occurs without extracting the target
  • hobnesii is detected in the biological sample when a fluorescent signal is detected for the hIS1001 target nucleic acid; (ii) B. parapertussis is detected in the biological sample when a fluorescent signal is detected for the IS 1001 target nucleic acid; and (iii) B. pertussis is detected in the biological sample when a fluorescent signal is detected for the IS481 target nucleic acid and no fluorescent signal is detected for the hIS1001 target nucleic acid, wherein the pathogenic Bordetella species is one or more of B. pertussis, B. parapertussis, and B. hohnesii; and wherein the biological sample is not subjected to an extraction or purification step prior to amplification.
  • Real-time PGR amplification may be performed in a direct amplification disc in concert with an integrated thermal cycler.
  • the biological sample may comprise a nasopharyngeal (NP) aspirate or wash, nasal swab, or a bacterial isolate.
  • NP nasopharyngeal
  • All primer pairs may be contained together in an amplification master mix further comprising DNA polymerase, dNTPs and PGR buffer prior to contacting with the biological sample.
  • the amplification master mix may further comprise a fourth primer pair that specifically hybridizes under stringent conditions to a control target nucleic acid.
  • the biological sample may be brought into contact with one or more of the primer pairs separately or simultaneously. Where the contact occurs simultaneously (i.e. multiplexing), one or mote of the first, second, and third primer pairs are brought into contact with the biological sample and with each other to amplify the target nucleic acid sequences.
  • the first primer pair consists of a first forward primer comprising 5' CCATAAGCATGCCCGATT 3 * (SEQ ID NO: 11) and a first reverse primer comprising 5' CGCTTCAGGCACACAAACT 3'(SEQ ID NO: 10).
  • the second primer pair consists of a second forward primer comprising 5' CGGCTCGACGAATTGC 3' (SEQ ID NO: 7) and a second reverse primer comprising 5' AGTTCGTCACGCAGGACAT 3' (SEQ ID NO: 8).
  • the third primer pair consists of a third forward primer comprising 5' GGCACGGATCGAGGTTTTT 3' (SEQ ID NO: 4) and a third reverse primer comprising 5' TACGGCCGTGAAGTGATAGA 3' (SEQ ID NO: 5).
  • control nucleic acid and a fourth primer pair complementary to a segment of the control nucleic acid may be included in the amplification mixture.
  • control nucleic acid comprises SEQ ID NO: 13.
  • fourth primer pair consists of a fourth forward primer comprising 5'
  • GCTTC AGTACC TTCGGC TTG 3' (SEQ ID NO: 17) and a fourth reverse primer comprising 5' TTGCAGGCATCTCTGACAAC 3' (SEQ ID NO: 18) to generate a control target nucleic acid of SEQ ID NO: 20.
  • the method further comprises contacting the biological sample with a first nucleic acid probe that is capable of specifically hybridizing to a segment of the IS481 target nucleic acid of SEQ ID NO: 1 , wherein the first nucleic acid probe is detectabry labeled and comprises 5' TCAATTGCTGGACCATTTCGAGTCGAC 3' (SEQ ID NO: 12).
  • the method further comprises contacting the biological sample with a second nucleic acid probe that is capable of specifically hybridizing to a segment of the complement of the IS1001 target nucleic acid of SEQ ID NO: 2, wherein the second nucleic acid probe is detectabry labeled and comprises 5' CAACCAGCCGCTGCTGACGGTC 3' (SEQ ID NO: 9).
  • the method further comprises contacting the biological sample with a third nucleic acid probe that is capable of specifically hybridizing to a segment of the hIS1001 target nucleic acid of SEQ ID NO: 3, wherein the third nucleic acid probe is detectably labeled and comprises 5' AGTCGCTGGCTACTGCTGCGCA 3' (SEQ ID NO: 6) ⁇
  • the first nucleic acid probe is detectably labelled with the FAM fiuorophore
  • the second nucleic acid probe is detectably labelled with the CFR610 fhiorophore
  • the third nucleic acid probe is detectably labelled with the JOE fhiorophore.
  • the method further comprises contacting the biological sample with a fourth nucleic acid probe, wherein the fourth nucleic acid probe is detectably labeled and comprises 5' TGGC TC TTGGCGGTCC AGATG 3' (SEQ ID NO: 19).
  • the fourth nucleic acid probe is detectably labelled with the Q670 fhiorophore.
  • the present disclosure provides a method for selecting a patient exhibiting pertussis-like symptoms for treatment with a therapeutic agent that inhibits B. hohnesii comprising: (a) contacting a biological sample obtained from the patient with: (i) a first primer pair that amplifies an IS481 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 1 or a complement thereof; (ii) a second primer pair that amplifies an IS 1001 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 2 or a complement thereof; and (iii) a third primer pair that amplifies a hIS 1001 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 3 or a complement thereof, to produce a reaction-sample mixture under conditions where amplification of the IS481, ISIOOI, and hIS1001 target nucleic acids
  • a fluorescent signal for the hIS1001 target nucleic acid is detected, wherein the biological sample is not subjected to an extraction or purification step prior to amplification.
  • real-time PGR amplification is performed in a direct amplification disc in concert with an integrated thermal cycler.
  • the biological sample may comprise a nasopharyngeal (NP) aspirate or wash, nasal swab, or a bacterial isolate.
  • NP nasopharyngeal
  • the first primer pair consists of a first forward primer comprising 5' CCATAAGCATGCCCGATT 3' (SEQ ID NO: 11) and a first reverse primer comprising 5' CGCTTCAGGCACACAAACT 3 * (SEQ ID NO: 10).
  • the second primer pair consists of a second forward primer comprising 5' CGGCTCGACGAATTGC 3' (SEQ ID NO: 7) and a second reverse primer comprising 5' AGTTCGTCACGCAGGACAT 3' (SEQ ID NO: 8).
  • the third primer pair consists of a third forward primer comprising 5' GGCACGGATCGAGGTTTTT 3' (SEQ ID NO: 4) and a third reverse primer comprising 5' TACGGCCGTGAAGTGATAGA 3' (SEQ ID NO: 5).
  • a control nucleic acid and a fourth primer pair complementary to a segment of the control nucleic acid may be included in the amplification mixture.
  • the control nucleic acid comprises SEQ ID NO: 13.
  • the fourth primer pair consists of a fourth forward primer comprising 5' GCTTC AGTACC TTCGGC TTG 3' (SEQ ID NO: 17) and a fourth reverse primer comprising 5' TTGC AGGCATC TC TGACAAC 3' (SEQ ID NO: 18) to generate a control target nucleic acid of SEQ ID NO: 20.
  • the method further comprises contacting the biological sample with a first nucleic acid probe that is capable of specifically hybridizing to a segment of the IS481 target nucleic acid of SEQ ID NO: 1, wherein the first nucleic acid probe is detectably labeled and comprises 5' TCAATTGCTGGACCATTTCGAGTCGAC 3 * (SEQ ID NO: 12).
  • the method further comprises contacting the biological sample with a second nucleic acid probe mat is capable of specifically hybridizing to a segment of the complement of the IS 1001 target nucleic acid of SEQ ID NO: 2, wherein the second nucleic acid probe is detectably labeled and comprises 5' CAACCAGCCGCTGCTGACGGTC 3' (SEQ ID NO: 9).
  • the method further comprises contacting the biological sample with a third nucleic acid probe that is capable of specifically hybridizing to a segment of the hIS1001 target nucleic acid of SEQ ID NO: 3, wherein the third nucleic acid probe is detectably labeled and comprises 5' AGTCGCTGGCTACTGCTGCGCA 3' (SEQ ID NO: 6) ⁇
  • the first nucleic acid probe is detectably labelled with the FAM fluorophore.
  • the second nucleic acid probe is detectably labelled with the CFR610 fluorophore, and the third nucleic acid probe is detectably labelled with the JOE fluorophore.
  • the method further comprises contacting the biological sample with a fourth nucleic acid probe, wherein the fourth nucleic acid probe is detectably labeled and comprises 5' TGGC TC TTGGCGGTCC AGATG 3' (SEQ ID NO: 19).
  • the fourth nucleic acid probe is detectably labelled with the Q670 fluorophore.
  • the therapeutic agent that inhibits B. hobiesii is one or more agents selected from the group consisting of fluoroquinolones, carbapenems, trimethoprini- sulfamethoxazole and B. holmesiispecifk: antibodies.
  • the fluoroquinolones are selected from the group consisting of ciprofloxacin, gemiiloxacin, kvofloxacin, norfloxacin, ofloxacin, rovafloxacin, gatifioxacin, grepafloxacm, temafioxacin, lomefloxacin, sparfloxacin, enoxacin, and moxifloxacin.
  • the carbapenems are selected from the group consisting of imipenem, meropenem, ertapenem, doripenem, panipenem, biapenem, razupenem (PZ-601), tebipeneni, lenapenem, tomopenem, and thienpenem (Thienamycin).
  • the present disclosure provides a method for selecting a patient exhibiting pertussis-like symptoms for treatment with a B. hohnesii-spccifk, antibody and an additional therapeutic agent mat inhibits B. parapertussis comprising: (a) contacting a biological sample obtained from the patient with: (i) a first primer pair that amplifies an IS481 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 1 or a complement thereof; (ii) a second primer pair that amplifies an IS 1001 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 2 or a complement thereof; and (iii) a third primer pair that amplifies a hIS 1001 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 3 or a complement thereof, to produce a reaction-sample mixture under conditions where amplification of the IS
  • i-specific antibody and an additional therapeutic agent if a fluorescent signal for the hIS 1001 target nucleic acid and a fluorescent signal for the IS 1001 target nucleic acid are detected, wherein the biological sample is not subjected to an extraction or purification step prior to amplification.
  • the additional therapeutic agent that inhibits B is added to the additional therapeutic agent that inhibits B.
  • parapertussis is one or more agents selected from the group consisting of trimethoprim- sulfamethoxazole, ciprofloxacin, gemifloxacm, levofloxacm, norfloxacin, ofloxacin, rovafloxacin, gatiftoxacin, grepafioxacin, temaftoxacin, lomefloxacin, sparfloxacin, enoxacin, and moxifloxacin.
  • the present disclosure provides a method for selecting a patient exhibiting pertussis-like symptoms for treatment with a therapeutic agent that inhibits B. pertussis and an additional therapeutic agent that inhibits B. parapertussis comprising: (a) contacting a biological sample obtained from the patient with: (i) a first primer pair that amplifies an IS481 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 1 or a complement thereof; (ii) a second primer pair that amplifies an IS 1001 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 2 or a complement thereof; and (hi) a third primer pair that amplifies a hIS1001 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 3 or a complement thereof, to produce a reaction-sample mixture under conditions where amplification of the IS481, IS1001,
  • parapertussis ⁇ if (i) a fluorescent signal for the IS 481 target nucleic acid and a fluorescent signal for the IS 1001 target nucleic acid are detected, and (ii) no fluorescent signal for the MS 1001 target miclek acid is detected, wherein the biological sample is not subjected to an extraction or purification step prior to amplification.
  • the additional therapeutic agent that inhibits B. parapertussis is one or more agents selected from the group consisting of trimethoprim- sulfamethoxazole, ciprofloxacin, gemifloxacm, levoffoxacin, norfloxacin, ofloxacin, rovafloxacin, gatifloxacin, grepafioxacin, temafloxacin, lomefloxacin, sparfloxacin, enoxacin, and moxifloxacin.
  • the therapeutic agent that inhibits B. pertussis is one or more agents selected from the group consisting of whole-cell (wP) B. pertussis vaccine, acellular B. pertussis vaccine, telithromycin and macro lide-antibioties.
  • the macrolide-antib iotics are selected from the group consisting of azithromycin (Zithromax), clarithromycin (Biaxin), erythromycin (E-Mycin, Eryc, Ery-Tab, PCE, Pediazole, Ilosone), and roxithromycin.
  • kite comprising oligonucleotides which may be primers or probes for performing amplifications as described herein.
  • the present disclosure provides methods for determining whether a patient exhibiting pertussis-like symptoms will benefit from treatment with therapeutic agents that inhibit Bordetetta hohnesii. These methods are based on detecting Bordetella pertussis, Bordetella parapertussis, and Bordetella hohnesii in a biological sample by assaying for the presence of the IS481 , IS 1001, and hIS1001 target repeat elements respectively using realtime PCR.
  • the disclosed methods comprise: (a) contacting the biological sample with: (i) a first primer pair that specifically hybridizes to a target nucleic acid sequence of the IS481 repeat element, if present; (ii) a second primer pair that specifically hybridizes to a target nucleic acid sequence of the ISIOOI repeat element, if present; and (hi) a third primer pair that specifically hybridizes to a target nucleic acid sequence of the hIS1001 repeat element, if present, to produce a reaction-sample mixture, under conditions where amplification of the IS481, ISIOOI, and hIS1001 target nucleic acids, if present in the biological sample, occurs without extracting the target nucleic acids from the biological sample; (b) subjecting the reaction-sample mixture to real-time polymerase chain reaction (PCR) conditions under which each of the target nucleic acids present in the biological sample is amplified to produce a fluorescent signal; (c) detecting the amount of fluorescent signal produced by each fluorophore
  • oligonucleotide includes a plurality of oligonucleotide molecules
  • a reference to "a nucleic acid” is a reference to one or more nucleic acids.
  • amplify or “amplification” with respect to nucleic acid sequences, refer to methods mat increase the representation of a population of nucleic acid sequences in a sample. Copies of a particular target nucleic acid sequence generated in vitro in an amplification reaction are called “amphcons” or “amplification products”. Amplification may be exponential or linear.
  • a target nucleic acid may be DNA (such as, for example, genomic DNA and cDNA) or RNA. While the exemplary methods described hereinafter relate to amplification using polymerase chain reaction (PCR), numerous other methods such as isothermal methods, rolling circle methods, etc., are well known to the skilled artisan.
  • An "amplification mixture” as used herein is a mixture of reagents mat are used in a nucleic acid amplification reaction, but does not contain primers or sample.
  • An amplification mixture comprises a buffer, dNTPs, and a DNA polymerase.
  • An amplification mixture may further comprise at least one of MgClz, KC1, nonionic and ionic detergents (including cationic detergents).
  • An "amplification master mix” comprises an amplification mixture and primers for amplifying one or more target nucleic acids, but does not contain the sample to be amplified.
  • complement refers to the Watson/Crick base-pairing rules.
  • nucleic acid sequence refers to an oligonucleotide which, when aligned with the nucleic acid sequence such that the 5' end of one sequence is paired with the 3' end of the other, is in "antiparallel association.”
  • sequence "5'-A-G-T-3"' is complementary to the sequence "3'-T-C-A-5.”
  • Certain bases not commonly found in naturally-occurring nucleic acids may be included in the nucleic acids described herein.
  • a complement sequence can also be an RNA sequence complementary to the DNA sequence or its complement sequence, and can also be a cDNA.
  • substantially complementary means that two sequences hybridize under stringent hybridization conditions. The skilled artisan will understand that substantially complementary sequences need not hybridize along their entire length. In particular, substantially complementary sequences may comprise a contiguous sequence of bases that do not hybridize to a target sequence, positioned 3' or 5' to a contiguous sequence of bases that hybridize under stringent hybridization conditions to a target sequence.
  • a “cycle threshold” (Ct) for an anaryte is the PCR cycle at which the fluorescence signal crosses a specified fluorescence threshold.
  • the Ct depends on the amplification reaction efficiency which includes stalling template copy number, organism lysis, PCR amplification, hybridization or cleavage of a fiuorogenic probe and sensitivity of detection.
  • the Ct provides a relative measure of the concentration of the target nucleic acid in the PCR reaction. Many factors other than the concentration of the target nucleic acid can impact the absolute value of Ct. However, artifacts from the reaction mix or instrument that change the fluorescence measurements associated with the Ct calculation will result in template-independent changes to the Ct value.
  • detecting refers to determining the presence of a target nucleic acid in the sample. Detection does not require the method to provide 100%
  • direct amplification refers to a nucleic acid amplification reaction in which the target nucleic acid is amplified from the sample without prior purification, extraction, or concentration.
  • extraction refers to any action taken to remove nucleic acids from other (non-nucleic acid) material present in the sample.
  • extraction includes mechanical or chemical lysis, addition of detergent or protease, or precipitation and removal of non-nucleic acids such as proteins.
  • fhiorophore refers to a molecule that absorbs light at a particular wavelength (excitation frequency) and subsequently emits light of a longer wavelength (emission frequency).
  • donor fhiorophore means a fhiorophore that, when in close proximity to a quencher moiety, donates or transfers emission energy to the quencher. As a result of donating energy to the quencher moiety, the donor fhiorophore will itself emit less light at a particular emission frequency that it would have in the absence of a closely positioned quencher moiety.
  • hybridize' * refers to a process where two substantially complementary nucleic acid strands (at least about 65% complementary over a stretch of at least 14 to 25 nucleotides, at least about 75%, or at least about 90% complementary) anneal to each other under appropriately stringent conditions to form a duplex or heteroduplex through formation of hydrogen bonds between complementary base pairs.
  • Hybridizations are typically and preferably conducted with probe-length nucleic acid molecules, preferably 15- 100 nucleotides in length, more preferably 18-50 nucleotides in length. Nucleic acid hybridization techniques are well known in the art. See, eg., Sambrook, et al., 1989,
  • Hybridization and the strength of hybridization is influenced by such factors as the degree of complementarity between the nucleic acids, stringency of the conditions involved, and the thermal melting point (Tm) of the formed hybrid.
  • Tm thermal melting point
  • hybridization conditions and parameters see, eg., Sambrook, et al., 1999, Molecular Cloning: A Laboratory Manual, Second Edition, Cold Spring Harbor Press, PJainview, N.Y.; Ausubel, F. M. et al. 1994, Current Protocols in Molecular Biology, John Wiley & Sons, Secaucus, N J.
  • specific hybridization occurs under stringent hybridization conditions.
  • An oligonucleotide or polynucleotide e.g., a probe or a primer
  • hybridize to the target nucleic acid under suitable conditions.
  • the terms "individual”, “patient”, or “subject” can be an individual organism, a vertebrate, a mammal, or a human. In a preferred embodiment, the individual, patient or subject is a human.
  • multiplex PCR refers to the simultaneous generation of two or more PCR products or ampiicons within the same reaction vessel. Each PCR product is primed using a distinct primer pair. A multiplex reaction may further include specific probes for each product that are labeled with different detectable moieties.
  • oligonucleotide refers to a molecule that has a sequence of nucleic acid bases on a backbone comprised mainly of identical monomer units at defined intervals. The bases are arranged on the backbone in such a way that they can bind with a nucleic acid having a sequence of bases that are complementary to the bases of the
  • Oligonucleotide The most common oligonucleotides have a backbone of sugar phosphate units. A distinction may be made between ohgodeoxyribonucleotides that do not have a hydroxyl group at the 2' position and oligoribonucleotides that have a hydroxyl group at the 2' position. Oligonucleotides may also include derivatives, in which the hydrogen of the hydroxyl group is replaced with organic groups, e.g., an allyl group.
  • Oligonucleotides that function as primers or probes are generally at least about 10-15 nucleotides in length or up to about 70, 100, 110, 150 or 200 nucleotides in length, and more preferably at least about 15 to 25 nucleotides in length. Oligonucleotides used as primers or probes for specifically amplifying or specifically detecting a particular target nucleic acid generally are capable of specifically hybridizing to the target nucleic acid.
  • a "pathogenic BordeteHa species” refers to any microbial organism of the Bordetella genus that is capable of causing whooping cough or a related condition in a subject (e.g., a human).
  • Specific pathogens include, for example, B. pertussis, B. parapertussis, or 5. hohnesii.
  • a "positive control nucleic acid” or “internal positive amplification control” as used herein is a nucleic acid known to be present in a sample at a certain amount or level.
  • a positive control nucleic acid is not naturally present in a sample and is added to the sample prior to subjecting the reaction-sample mixture to real-time polymerase chain reaction in the disclosed methods for detecting the presence of pathogenic Bordetella species in a sample.
  • the term "primer” refers to an oligonucleotide, which is capable of acting as a point of initiation of nucleic acid sequence synthesis when placed under conditions in which synthesis of a primer extension product which is complementary to a target nucleic acid strand is induced, i.e., in the presence of different nucleotide triphosphates and a polymerase in an appropriate buffer ("buffer” includes pH, ionic strength, cofactors etc.) and at a suitable temperature.
  • buffer includes pH, ionic strength, cofactors etc.
  • One or more of the nucleotides of the primer can be modified for instance by addition of a methyl group, a biotin or digoxigenin moiety, a fluorescent tag or by using radioactive nucleotides.
  • a primer sequence need not reflect the exact sequence of the template.
  • a non-complementary nucleotide fragment may be attached to the 5' end of the primer, with the remainder of the primer sequence being substantially complementary to the strand.
  • primer as used herein includes all forms of primers mat may be synthesized including peptide nucleic acid primers, locked nucleic acid primers, phosphorothioate modified primers, labeled primers, and the like.
  • the term "forward primer” as used herein means a primer that anneals to the anti-sense strand of double-stranded DNA (dsDNA).
  • a "reverse primer” anneals to the sense-strand of dsDNA.
  • Primers are typically at least 10, 15, 18, or 30 nucleotides in length or up to about 100, 110, 125, or 200 nucleotides in length. In some embodiments, primers are preferably between about 15 to about 60 nucleotides in length, and most preferably between about 25 to about 40 nucleotides in length. In some embodiments, primers are 15 to 35 nucleotides in length. There is no standard length for optimal hybridization or polymerase chain reaction amplification. An optimal length for a particular primer application may be readily determined in the manner described in H. Erlich, PCR Technology, PRINCIPLES AND
  • a "primer extension reaction” refers to a synthetic reaction in which an oligonucleotide primer hybridizes to a target nucleic acid and a complementary copy of the target nucleic acid is produced by die polymerase-dependent 3 '-addition of individual complementary nucleotides, hi some embodiments, the primer extension reaction is PCR.
  • primer pair refers to a forward and reverse primer pair ⁇ i.e., a left and right primer pair) mat can be used together to amplify a given region of a nucleic acid of interest.
  • Probe refers to nucleic acid mat interacts with a target nucleic acid via hybridization.
  • a probe may be fully complementary to a target nucleic acid sequence or partially complementary. The level of complementarity will depend on many factors based, in general, on the function of the probe. Probes can be labeled or unlabeled, or modified in any of a number of ways well known in the art. A probe may specifically hybridize to a target nucleic acid. Probes may be DNA, RNA or a RNA/DNA hybrid.
  • Probes may be oligonucleotides, artificial chromosomes, fragmented artificial chromosome, genomic nucleic acid, fragmented genomic nucleic acid, RNA, recombinant nucleic acid, fragmented recombinant nucleic acid, peptide nucleic acid (PNA), locked nucleic acid, oligomer of cyclic heterocycks, or conjugates of nucleic acid. Probes may comprise modified nucleobases, modified sugar moieties, and modified mtemucleotide linkages. A probe may be used to detect the presence or absence of a methylated target nucleic acid. Probes are typically at least about 10, 15, 20, 25, 30, 35, 40, 50, 60, 75, 100 nucleotides or more in length.
  • a "probe element” as used herein refers to a stretch of nucleotides that (a) is associated with a primer in that it is connected to or located adjacent to the primer nucleic acid sequence, and (b) specifically hybridizes under stringent conditions to a target nucleic acid sequence to be detected.
  • primer-probe detection system refers to a method for realtime PCR. This method utilizes a bi-functiona] molecule (referred to herein as a primer- probe), which contains a PCR primer element covalently linked by a porymerase-blocking group to a probe element. Additionally, each primer-probe molecule contains a ffaiorophore that interacts with a quencher to reduce the background fluorescence.
  • primer-probes as used herein, may comprise a 3' primer with a 5' extended probe tail comprising a hairpin structure which possesses a fluorophore/quencher pair.
  • the polymerase is blocked from extending into the probe tail by the inclusion of hexethyfene glycol (HEG).
  • HEG hexethyfene glycol
  • the 3* target-specific primer anneals to the target nucleic acid and is extended such that the primer-probe is now incorporated into the newly synthesized strand, which possesses a newly synthesized target region for the 3' probe.
  • the probe region of the primer-probe hairpin loop will hybridize to the target, thus separating the fluorophore and quencher and creating a measurable signal.
  • SCORPION primers are exemplary primer-probes.
  • quencher moiety means a molecule that, in close proximity to a donor fluorophore, takes up emission energy generated by the donor and either dissipates the energy as heat or emirs light of a longer wavelength than the emission wavelength of the donor. In the latter case, the quencher is considered to be an acceptor fluorophore.
  • the quenching moiety can act via proximal (i.e., collisional) quenching or by Fdrster or fluorescence resonance energy transfer (“FRET"). Quenching by FRET is generally used in TaqMan® probes while proximal quenching is used in molecular beacon and ScorpionTM type probes.
  • reaction-sample mixture refers to a mixture containing amplification master mix and a sample.
  • sample refers to clinical samples obtained from a patient or isolated microorganisms.
  • a sample is obtained from a biological source (i.e., a "biological sample"), such as tissue, bodily fluid, or microorganisms collected from a subject.
  • Sample sources include, but are not limited to, mucus, sputum (processed or unprocessed), bronchial alveolar lavage (BAL), bronchial wash (BW), blood, bodily fluids, cerebrospinal fluid (CSF), urine, plasma, serum, or tissue (eg., biopsy material).
  • Preferred sample sources include nasopharyngeal and/or throat swabs or nasal washes.
  • sensitivity is a measure of the ability of a method to detect a preselected sequence variant in a heterogeneous population of sequences.
  • a method has a sensitivity of S % for variants of F % if, given a sample in which the preselected sequence variant is present as at least F % of the sequences in the sample, the method can detect the preselected sequence at a preselected confidence of C %, S % of the time.
  • Exemplary sensitivities include at least 50, 60, 70, 80, 90, 95, 98, and 99%.
  • oligonucleotide primer specifically used herein in reference to an oligonucleotide primer means that the nucleotide sequence of the primer has at least 12 bases of sequence identity with a portion of the nucleic acid to be amplified when the oligonucleotide and the nucleic acid are aligned.
  • An oligonucleotide primer that is specific for a nucleic acid is one that, under the stringent hybridization or washing conditions, is capable of hybridizing to the target of interest and not substantially hybridizing to nucleic acids which are not of interest. Higher levels of sequence identity are preferred and include at least 75%, at least 80%, at least 85%, at least 90%, at least 85-95% and more preferably at least 98% sequence identity.
  • Sequence identity can be determined using a commercially available computer program with a default setting that employs algorithms well known in the art.
  • sequences that have "high sequence identity” have identical nucleotides at least at about 50% of aligned nucleotide positions, preferably at least at about 60% of aligned nucleotide positions, and more preferably at least at about 75% of aligned nucleotide positions.
  • Specificity is a measure of the ability of a method to distinguish a truly occurring preselected sequence variant from sequencing artifacts or other closely related sequences. It is the ability to avoid false positive detections. False positive detections can arise from errors introduced into the sequence of interest during sample preparation, sequencing error, or inadvertent sequencing of closely related sequences like pseudo-genes or members of a gene family.
  • a method has a specificity of X % if, when applied to a sample set of Ni b td sequences, in which ⁇ 3 ⁇ 4 « sequences are truly variant and ⁇ * > ⁇ true are not truly variant, the method selects at least X % of the not truly variant as not variant.
  • a method has a specificity of 90% if, when applied to a sample set of 1,000 sequences, in which 500 sequences are truly variant and 500 are not truly variant, the method selects 90% of the 500 not truly variant sequences as not variant.
  • Exemplary specificities include at least 50, 60, 70, 80, 90, 95, 98, and 99%.
  • hybridization conditions at least as stringent as the following: hybridization in 50%
  • stringent hybridization conditions should not allow for hybridization of two nucleic acids which differ over a stretch of 20 contiguous nucleotides by more than two bases.
  • TaqMan® PCR detection system refers to a method for real-time PCR.
  • a TaqMan® probe which hybridizes to the amplified nucleic acid segment is included in the amplification master mix.
  • the TaqMan® probe comprises a donor and a quencher fluorophore on either end of the probe and in close enough proximity to each other so that the fluorescence of the donor is taken up by the quencher.
  • the 5'-exonucfease activity of the Taq polymerase cleaves the probe thereby allowing the donor fluorophore to emit fluorescence which can be detected.
  • target nucleic acid refers to a nucleic acid sequence of interest to be detected and/or quantified in the sample to be analyzed.
  • Target nucleic acid may be composed of segments of a chromosome, a complete gene with or without intergenk sequence, segments or portions of a gene with or without intergenic sequence, or sequence of nucleic acids which probes or primers are designed.
  • Target nucleic acids may include a wild-type sequences), a mutation, deletion, insertion or duplication, tandem repeat elements, a gene of interest, a region of a gene of interest or any upstream or downstream region thereof
  • Target nucleic acids may represent alternative sequences or alkies of a particular gene.
  • Target nucleic acids may be derived from genomic DNA, cDNA, orRNA.
  • Pertussis continues to be a significant cause of morbidity and infant mortality worldwide. World Health Organization, Wkly. Epidemiol Rec. 80:31-38 (2005). Despite the availability of B. pertussis vaccines, the reported incidence of whooping cough in industrialized countries has been on the rise for the past 20 years. The increased incidence of pertussis has been attributed to several factors including waning immunity, increased public health awareness and reporting, and use of more sensitive diagnostics such as PCR-based assays.
  • B. hobnesii pertussis-like illness due to B. hobnesii occurs in the United States. Weber, D. J. et al, Infect. Control Hosp. Epidemiol. 31:875-877 (2010). Further, B. bronchiseptica is occasionally isolated from the upper respiratory tract of immimocomproniised individuals. Wernli, D. et al, Clin. Microbiol Infect. 17:201-203 (2010). Therefore, species identification and confirmation of Bordetella species must occur to allow an accurate diagnosis and management of pertussis and pertussis-like diseases in humans.
  • the multicopy insertion sequence IS481 is often utilized as a target nucleic acid sequence in real-time PCR assays for detecting B. pertussis infection because the B. pertussis genome typically contains about 50-200 copies of IS481, making this assay highly sensitive.
  • single anafyte PCR assays that only target IS481 can yield false positive results for pertussis because IS481 is also found in B. hobnesii (8 to 10 copies per genome), and in animal isolates of B. bronchiseptica. Register, K. et al., J. Chn. Microbiol. 44:4577-4583 (2006); Reischl, U. et al, J. Clin. Microbiol.
  • the present disclosure provides a sensitive and specific real-time multiplex PCR assay that simultaneously targets the IS481, B. parapertussis IS 1001, and B. holmesii hIS 1001 repeat elements, thus permitting the rapid identification of one or more pathogenic Bordetella species in a biological sample.
  • the methods and compositions of the present technology are useful in detecting pathogenic Bordetella species by assaying for target nucleic acid sequences corresponding to the IS481, IS 1001, and hIS 1001 multicopy insertion sequences in a biological sample obtained from a subject.
  • Samples for pathogenic Bordetella species detection may also comprise cultures of bacterial isolates grown on appropriate media to form colonies, wherein the cultures were prepared from a biological sample obtained from a subject.
  • Step sites include body fluids such as whole blood, plasma, cell free plasma, urine, cerebrospinal fluid, synovial fluid, pleural fluid, pericardial fluid, intraocular fluid, tissue biopsies or endotracheal aspirates.
  • cell-free plasma refers to plasma containing less than 1% cells by volume.
  • Non-sterile sites include sputum, stool, skin swabs, inguinal swabs, nasal swabs and throat swabs.
  • the biological samples comprise nasopharyngeal (NP) aspirates or swabs or nasal washes.
  • the biological samples comprise cultures of isolated bacteria grown on appropriate media to form colonies. Samples may also include bacterial isolates.
  • a biological sample may be suspected of containing pathogenic Bordetella species and/or nucleic acids of one or more pathogenic Bordetella species.
  • a biological sample may be obtained from a subject suspected of being infected with one or more pathogenic Bordetella species.
  • the biological sample may be contacted with an amplification master mix for use in a mkroflidic/microelectronic centrifugation platform.
  • the disclosed methods preferably employ unprocessed biological samples thus resulting in a direct, streamlined sample-to-result process
  • the detection methods disclosed herein will be effective if used on isolated nucleic acid (DNA or RNA) purified from a biological sample according to any methods well known to those of skill in the art.
  • the sample may be collected or concentrated by centrifngation and the hke.
  • the cells of the sample may be subjected to lysis, such as by treatments with enzymes, heat surfactants, ubrasonication or a combination thereof.
  • a biological sample may be processed using a commercially available nucleic acid extraction kit.
  • one or more primer pairs are present in an amplification master mix mat further comprises DNA polymerase, dNTPs and PGR buffer prior to contact with the biological sample.
  • Amplification of the IS481, IS 1001, and hIS1001 target repeat elements preferably occurs in a multiplex format.
  • individual PCR reactions for each multicopy insertion sequence may also be used.
  • the biological sample may be contacted with the primer pair(s) and/or with an amplification master mix to form a reaction-sample mixture in a direct amplification disc.
  • the biological sample may be contacted with the amplification master mix in a direct amplification disc such as the Direct Amplification Disc marketed by Focus Diagnostics, Inc.
  • a direct amplification disc is a thin, circular disc containing multiple designated regions, each of which contains a well for receiving an amplification master mix and an associated well for receiving unprocessed patient sample.
  • the sample-reaction mixture is produced in the direct amplification disc upon or after addition of the amplification master mix and the sample.
  • Amplification of target nucleic acids can be detected by any of a number of methods well-known in the art such as gel electrophoresis, column chromatography, hybridization with a probe, sequencing, melting curve analysis, or "real-time" detection.
  • primers and/or probes may be detectabry labeled to allow differences in fluorescence when the primers become incorporated or when die probes are hybridized, for example, and amplified in an instrument capable of monitoring the change in fluorescence during the reaction.
  • Real-time detection methods for nucleic acid amplification are well known and include, for example, the TaqMan® system, ScorpionTM primer system and use of intercalating dyes for double-stranded nucleic acid.
  • amplified nucleic acids are detected by hybridization with a specific probe.
  • Probe oligonucleotides, complementary to a portion of the amplified target sequence may be used to detect amplified fragments.
  • hybridization may be detected in real time. In an alternate embodiment, hybridization is not detected in real time.
  • Amplified nucleic acids for each of the target sequences may be detected simultaneously (i.e., in the same reaction vessel such as multiplex PCR) or individually (i.e., in separate reaction vessels).
  • multiple target nucleic acids are detected simultaneously, using two or more distniguishabry-labeled (eg., via different detectable moieties such as color), gene-specific oligonucleotide probes, one which hybridizes to the first target sequence and the other which hybridizes to the second target sequence.
  • the different primer pairs are labeled with different distinguishable detectable moieties.
  • HEX and FAM fluorescent dyes may be present on different primer pairs in the multiplex PCR and associated with the resulting amplicons.
  • the forward primer is labeled with one detectable moiety
  • the reverse primer is labeled with a different detectable moiety, e.g. FAM dye for a forward primer and HEX dye for a reverse primer.
  • Use of different detectable moieties is useful for discriminating between amplified products which are of the same length or are very similar in length.
  • the target may be independently selected from the top strand or the bottom strand.
  • all targets to be detected may comprise top strand, bottom strand, or a combination of top strand and bottom strand targets.
  • One general method for real-time PCR uses fluorescent probes such as the TaqMan® probes, molecular beacons, and Scorpion primer-probes.
  • Real-time PCR quantifies the initial amount of the template with more specificity, sensitivity and reproducibility, than other forms of quantitative PCR, which detect the amount of final amplified product.
  • Real-time PCR does not detect the size of the amphcon.
  • the probes employed in ScorpionTM and TaqMan® technologies are based on the principle of fluorescence quenching and involve a donor fluorophore and a quenching moiety.
  • Real-time PCR is performed using any suitable instrument capable of detecting the accumulation of the PCR amplification product.
  • the instrument is capable of detecting fluorescence from one or more fluorescent labels.
  • real-time detection on the instrument ⁇ e.g., an ABI Real-Time PCR System 7500® sequence detector
  • the threshold cycle, or Ct value is the cycle at which fluorescence intersects the threshold value.
  • the threshold value can be determined by the sequence detection system software or manually.
  • the probes employed are detectabh/ labeled and the detecting is accomplished by detecting the probe label for each amplification product.
  • a quencher may further be associated with the detectable label which prevents detection of the label prior to amplification of the probe's target.
  • TaqMan® probes are examples of such probes. [0085] TaqMan® probes (Heid et al, Genome Res. 6: 986-994, 1996) use the fhiorogenic 5' exomidease activity of Taq polymerase to measure the amount of target sequences in DNA samples.
  • TaqMan® probes are oligonucleotides that contain a donor fhiorophore usually at or near the 5' base, and a quenching moiety typically at or near the 3' base.
  • the quencher moiety may be a dye such as TAMRA or may be a non- fluorescent molecule such as 4- ⁇ 4 - dimethylaminophenylazo) benzoic acid (DABCYL). See Tyagi et al., 16 Nature Biotechnology 49-53 (1998).
  • the excited fluorescent donor transfers energy to the nearby quenching moiety by FRET rather man fluorescing.
  • FRET fluorescing
  • TaqMan® probes are designed to anneal to an internal region of a PCR product.
  • real-time PCR is performed using a Afunctional primer- probe detection system (e.g., ScorpionTM primers).
  • Scorpion primers sequence-specific priming and PCR product detection is achieved using a single molecule.
  • the Scorpion primer maintains a stem-loop configuration in the unhybridized state.
  • the fhiorophore is attached to the 5* end and is quenched by a moiety coupled to the 3' end, although in certain embodiments, this arrangement may be switched.
  • the 3* portion of the stem and/or loop also contains sequence that is complementary to the extension product of the primer and is linked to the 5' end of a specific primer via a non-amplifkble monomer.
  • the specific probe sequence After extension of the primer moiety, the specific probe sequence is able to bind to its complement within the extended ainphcon, thus opening up the hairpin loop. This prevents the fluorescence from being quenched and a signal is observed.
  • a specific target is amplified by the reverse primer and the primer portion of the ScorpionTM primer, resulting in an extension product. A fluorescent signal is generated due to the separation of the fhiorophore from the quencher resulting from the binding of the probe element of the ScorpionTM primer to the extension product.
  • the probes employed in the disclosed methods comprise or consist of short fluorescently labeled DNA sequences designed to detect sections of DNA sequence with a genetic variation such as those disclosed in French et a/., Mol Cell Probes, 5(6):363-74 (2001), incorporated by reference herein in its entirety.
  • HyBeacons® are an example of this type of probe.
  • At least one primer of each primer pair or at least one probe in the amplification reaction comprises a detectable moiety.
  • the detectable moiety may be on a probe that is attached to me primer, such as with a primer- probe.
  • the detectable moiety or label is a fhiorophore.
  • Suitable fluorescent moieties include, but are not limited to the following fhiorophores: 4-acetamido-
  • FITC hexachloro-6-caiboxyfluorescein
  • HEX hexachloro-6-caiboxyfluorescein
  • XRITC QFITC
  • TET tetrachlorofluorescein
  • fluorescamine IR144, IR1446, lanthamide phosphors, Malachite Green
  • isothiocyanate 4-inethyhinibelliferone, ortho cresolphthakin, nitro tyrosine, pararosamlme, Phenol Red, B-phycoeiytfaxin, R-phycoeiythrin, allopliycocyanin, o-phthaldialdehyde, Oregon Green®, propidium iodide, pyrene and derivatives (pyrene, pyrene butyrate, succinimidyl l ⁇ yrene butyrate), QSY® 7, QSY® 9, QSY® 21, QSY® 35 (Molecular Probes), Reactive Red 4 (Cibacron® Brilliant Red 3B-A), rhodainine and derivatives (6- carboxy-X-rhodamine (ROX), 6-carboxyrhodarnine (R6G), lissamine rhodamine B sulfonyl chloride, rhodainine (Rhod),
  • Suitable quenchers are selected based on the fluorescence spectrum of the particular fhiorophore.
  • Useful quenchers include, for example, the Black HoleTM quenchers BHQ-1, BHQ 2, and BHQ-3 (Biosearch Technologies, Inc.), and the ATTO -series of quenchers (ATTO 540Q, ATTO 580Q, and ATTO 612Q; Atto-Tec GmbH).
  • the reaction-sample mixture is subjected to realtime polymerase chain reaction (PGR) conditions under which each of the target nucleic acids present in the biological sample is amplified and the amplified produces) are detected and measured.
  • PGR polymerase chain reaction
  • the biological sample is loaded directly into a direct amplification disc without a separate, front-end specimen preparation, followed by Real-time PCR detection and differentiation of target anaJytes in the same disc.
  • the amplification is performed in a Direct Amplification Disc (an 8-well disc from Focus Diagnostics, Inc.).
  • real-time PCR amplification is performed using the SIMPLEXA Direct assay in a direct amplification disc and detection is performed using an integrated thermal cycler such as the 3MTM Integrated Cycler sold by 3M (St. Paul, Minn., USA).
  • the 3MTM Integrated Cycler can receive a Direct Amplification Disc and is capable of performing multiple assays per disc.
  • This apparatus can heat at >5° C. per second and cool at >4° C. per second. Cycling parameters can be varied, depending on the length of the amplification products to be extended.
  • an internal positive amplification control (IPC) can be included in the sample, utilizing oligonucleotide primers, probes and/or primer-probes.
  • detection of the target nucleic acids can occur by measuring the end-point of the reaction.
  • the amphcon(s) could be detected by first size-separating the amplicons, and men detecting the size-separated amplicons.
  • the separation of amplicons of different sizes can be accomplished by gel electrophoresis, column chromatography, capillary electrophoresis, or other separation methods known in the art.
  • the detectable label can be incorporated into, associated with or conjugated to a nucleic acid.
  • Label can be attached by spacer arms of various lengths to reduce potential steric hindrance or impact on other useful or desired properties. See, e.g., Mansfield, 9 Mo J. Cell Probes 145-156 (1995).
  • Detectable labels can be incorporated into nucleic acids by covalent or non-covalent means, e.g., by transcription, such as by random-primer labeling using Klenow polymerase, or nick translation, or amplification, or equivalent as is known in the art.
  • a nucleotide base is conjugated to a detectable moiety, such as a fluorescent dye, and men incorporated into nucleic acids during nucleic acid synthesis or amplification.
  • Examples of other useful labels that aid in the detection of target nucleic acids include radioisotopes electron-dense reagents (e.g., gold),
  • labels include ligands or oligonucleotides capable of forming a complex with the corresponding receptor or oligonucleotide complement, respectively.
  • the label can be directly incorporated into the nucleic acid to be detected, or it can be attached to a probe (e.g., an oligonucleotide) or antibody that hybridizes or binds to the nucleic acid to be detected.
  • fluorescent nucleotide analogs can be used to label nucleic acids, see, e.g., Jameson, Methods. Enzymol 278: 363-390 (1997); Zhu, Nucl Acids Res. 22: 3418-3422 (1994).
  • U.S. Patent Nos. 5,652,099 and 6,268,132 also describe nucleoside analogs for incorporation into nucleic acids, e.g., DNA and/or RNA, or oligonucleotides, via either enzymatic or chemical synthesis to produce fluorescent oligonucleotides.
  • U.S. Patent No.5,135,717 describes phthalocyanine and tetrabenztriazaporphyrin reagents for use as fluorescent labels.
  • detectabry labeled probes can be used in hybridization assays including, but not limited to Northern blots, Southern blots, microarray, dot or slot blots, and in situ hybridization assays such as fluorescent in situ hybridization (FISH) to detect a target nucleic acid sequence within a biological sample.
  • FISH fluorescent in situ hybridization
  • Certain embodiments may employ hybridization methods for measuring expression of a polynucleotide gene product, such as lnRNA. Methods for conducting polynucleotide hybridization assays have been well developed in the art. Hybridization assay procedures and conditions will vary depending on the application and are selected in accordance with the general binding methods known including those referred to in: Maniatis et al.
  • the B. hohnesii genome typically contains about 3-5 copies of the hIS1001 sequence and 8-10 copies of the IS481 sequence.
  • the B. parapertussis genome typically contains about 20 copies of the IS 1001 sequence.
  • B. pertussis typically contains about 50- 200 copies of the IS 481 sequence.
  • primers and probes are used in the methods described herein to amplify and detect target nucleic acid sequences of pathogenic Bordetella species.
  • target nucleic acids may include the IS481 insertion sequence (and fragments thereof) from B. pertussis and B. hohnesii, the IS1001 insertion sequence (and fragments thereof) from B. parapertussis, and the hIS 1001 insertion sequence (and fragments thereof) from B. hohnesii. hi addition, primers can also be used to amplify one or more control nucleic acid sequences.
  • control nucleic acid sequence comprises 5'
  • nucleic acid probe comprising 5' TGGC TC TTGGCGGTCC AGATG 3' (SEQ ID NO: 19) are used to amplify the control nucleic acid sequence.
  • the control target nucleic acid comprises 5'
  • the primers and probes of the present technology are used in the methods described herein to amplify and detect a target nucleic acid comprising SEQ ID NO: 1 corresponding to the IS481 repeat element, a target nucleic acid comprising SEQ ID NO: 2 corresponding to the IS 1001 repeat element, and a target nucleic acid comprising SEQ ID NO: 3 corresponding to the hIS1001 repeat element.
  • the method involves employing primer pairs specifically directed to IS481, IS 1001 and hIS1001 repeat elements.
  • the target nucleic acids described herein may be detected individually or in a multiplex format, utilizing individual labels for each target.
  • Specific primers, probes and primer-probes for amplification and detection of all or a fragment of a marker gene specific for B. holmesii include those directed to sequences present in B. holmesii, but absent from other Bordetella species. The detection of a B.
  • holmesii-specific gene helps to distinguish a sample containing B. holmesii from one that may contain another pathogenic species, e.g. t B. pertussis.
  • a suitable marker gene is the hIS1001 multicopy insertion sequence (see, eg., GenBank Accession No. AY786982.1) and is shown below.
  • the IS481 target nucleic acid comprises 5'
  • Exemplary primer and labeled probe sequences for amplifying and detecting the IS 481 multicopy insertion sequence include:
  • pertussis using the disclosed method may utilize primer pairs, labeled probes and real-time PCR for amplification and detection of the IS481 , IS 1001 and hIS1001 repeat elements on a direct amplification disc with an integrated cycler system.
  • target genomic DNA is specifically amplified and simultaneously detected by fluorescent-labeled probes in the same reaction.
  • the probe that specifically hybridizes to the hIS1001 repeat element may comprise a JOE label and each of the probes that specifically hybridizes to the IS481 and IS 1001 repeat elements may comprise a FAM label and a CFR610 label respectively.
  • the probe that specifically hybridizes to the control target nucleic acid may comprise a Q670 ftuorophore.
  • the present disclosure provides a method for detecting the presence of at least one pathogenic Bordetella species in a biological sample comprising: (a) contacting the biological sample with: (i) a first primer pair that amplifies an IS481 target nucleic acid comprising nucleotides that are at feast 85-95% identical to SEQ ID NO: 1 or a complement thereof; (ii) a second primer pair that amplifies an IS1001 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 2 or a complement thereof; and (iii) a third primer pair that amplifies a his 1001 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 3 or a complement thereof, to produce a reaction-sample mixture under conditions where amplification of the IS481 , IS 1001 , and hIS1001 target nucleic acids, if present in the biological sample, occurs without extract
  • holmesii is detected in the biological sample when a fluorescent signal is detected for the hIS 1001 target nucleic acid;
  • B. parapertussis is detected in the biological sample when a fluorescent signal is detected for the IS 1001 target nucleic acid;
  • B. pertussis is detected in the biological sample when a fluorescent signal is detected for the IS481 target nucleic acid and no fluorescent signal is detected for the hIS1001 target nucleic acid, wherein the pathogenic Bordetella species is one or more of B. pertussis, B. parapertussis, and B. hohnesii; and wherein the biological sample is not subjected to an extraction or purification step prior to amplification.
  • Real-time PGR amplification may be performed in a direct amplification disc in concert with an integrated thermal cycler.
  • the biological sample may comprise a nasopharyngeal (NP) aspirate or wash, nasal swab, or a bacterial isolate.
  • NP nasopharyngeal
  • Examples of therapeutic agents that inhibit B. hohnesii include fluoroquinolones, carbapenems, trimethoprim-sulfamethoxazole (eg., Bactrim, Septra), and 5. holmesii- specifk antibodies.
  • the fluoroquinolones are selected from the group consisting of ciprofloxacin, gemifloxacin, levofioxacin, norfloxacin, ofloxacin, rovafloxacin, gatifloxacin, grepafloxacin, temafioxacin, lomefloxacin, sparfloxacin, enoxacin, and moxifloxacin.
  • the carbapenems are selected from the group consisting of imipenem, meropenem, ertapenem, doripenem, panipenem, biapeneni, razupenem (PZ-601), tebipenem, lenapenem, tomopenem, and thienpenem (Thienamycin).
  • Examples of therapeutic agents that inhibit B. pertussis include whole-ceil (wP) B. pertussis vaccine, aceliular 5. pertussis vaccine, trimethoprim-sulfamethoxazole (e.g., Bactrim, Septra), telithromycin and macrolide-antibiotics.
  • the macrolide-antibioties are selected from the group consisting of azithromycin (Zithromax), clarithromycin (Biaxin), erythromycin (E-Mycin, Eryc, Ery-Tab, PCE, Pediazole, Ilosone), and roxithromycin.
  • Examples of therapeutic agents mat inhibit B. parapertussis include trimethoprim- sulfamethoxazole (e.g., Bactrim, Septra), ciprofloxacin, gemifloxacin, levofloxacin, norfloxacin, ofloxacin, rovafloxachi, gatifloxachi, grepafloxacin, temafloxacin, lomefloxacin, sparfloxacin, enoxacin, and moxifioxacin.
  • trimethoprim- sulfamethoxazole e.g., Bactrim, Septra
  • ciprofloxacin gemifloxacin
  • levofloxacin levofloxacin
  • norfloxacin norfloxacin
  • grepafloxacin grepafloxacin
  • temafloxacin lomefloxaci
  • the present disclosure provides a method for selecting a patient exhibiting pertussis-like symptoms for treatment with a therapeutic agent that inhibits B. habnesii comprising: (a) contacting a biological sample obtained from the patient with: (i) a first primer pair that amplifies an IS481 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 1 or a complement thereof; (ii) a second primer pair that amplifies an IS 1001 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 2 or a complement thereof; and (iii) a third primer pair that amplifies a hIS1001 target nucleic acid comprising nucleotides mat are at least 85-95% identical to SEQ ID NO: 3 or a complement thereof, to produce a reaction-sample mixture under conditions where amplification of the IS481, 151001, and hIS1001 target nucleic acids, if
  • the therapeutic agent mat inhibits B. hohnesii is one or more agents selected from the group consisting of fluoroquinolones, carbapenems, trimethoprini-siilfaniethoxazole and B. ho!mesii-specific antibodies.
  • the fluoroquinolones are selected from the group consisting of ciprofloxacin, gemifloxacin, fevofbxacin, norfloxacin, ofloxacin, rovafioxacin, gatifioxacin, grepafloxacin, temafloxacin, lomefloxacin, sparfloxacin, enoxacin, and moxifloxacin.
  • the carbapenems are selected from the group consisting of imipenem, meropenem, ertapenem, doripenem, panipenem, biapenem, razupenem (PZ-601), tebipenem, lenapenem, tomopenem, and thienpenem (Thienamycin).
  • the present disclosure provides a method for selecting a patient exhibiting pertussis-like symptoms for treatment with a B. hohnesii-spccifk, antibody and an additional therapeutic agent mat inhibits B. parapertussis comprising: (a) contacting a biological sample obtained from the patient with: (i) a first primer pair that amplifies an IS48I target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 1 or a complement thereof, (ii) a second primer pair that amplifies an IS 1001 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 2 or a complement thereof; and (iii) a third primer pair mat amplifies a hIS 1001 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 3 or a complement thereof, to produce a reaction-sample mixture under conditions where amplification of the IS
  • the additional therapeutic agent mat inhibits B.
  • parapertussis is one or more agents selected from the group consisting of trimethoprim- sulfamethoxazole, ciprofloxacin, gemifloxacin, levofloxacin, norfloxacin, ofloxacin, rovafloxacin, gatifloxacin, grepafloxacin, temafioxacin, Iomefloxacin, sparfloxacin, enoxacin, and inoxifloxacin.
  • the present disclosure provides a method for selecting a patient exhibiting pertussis-like symptoms for treatment with a therapeutic agent mat inhibits B. pertussis and an additional therapeutic agent that inhibits B. parapertussis comprising: (a) contacting a biological sample obtained from the patient with: (i) a first primer pair that amplifies an IS481 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 1 or a complement thereof; (ii) a second primer pair that amplifies an IS 1001 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 2 or a complement thereof; and (iii) a third primer pair that amplifies a hIS1001 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 3 or a complement thereof, to produce a reaction-sample mixture under conditions where amplification of the IS481, ISI
  • the additional therapeutic agent mat inhibits B. parapertussis is one or more agents selected from the group consisting of trimethoprim- sulfamethoxazole, ciprofloxacin, gemifloxacin, levofloxacin, norfloxacin, ofloxacin, rovafloxacin, gatifloxacin, grepafloxacin, temafloxacin, Iomefloxacin, sparfloxacin, enoxacin, and inoxifloxacin.
  • the therapeutic agent that inhibits B. pertussis is one or more agents selected from the group consisting of whole-cell (wP) B. pertussis vaccine, acellular B. pertussis vaccine, telithromycin and niacrolide-antib iorics .
  • the inacrolide-antib iotics are selected from the group consisting of azithromycin (Zithromax), clarithromycin (Biaxhi), erythromycin (E-Mycin, Eryc, Ery-Tab, PCE, Pediazole, Ilosone), and roxithromycin.
  • the methods of the present technology Upon subjecting the sample-reaction mixtures to real-time PCR, and detecting and measuring the fluorescence signals associated with the amplified IS481, IS1001, and hISlOOi target repeat elements, the methods of the present technology further provide an algorithm for determining the presence of one or more related pathogenic Bordetella species (i.e., B.
  • the hISlOOi target nucleic acid sequence is amplified using a probe that is labeled with JOE
  • the IS 1001 target nucleic acid sequence is amplified using a probe labeled with a xanthene dye that fluoresces in the red region of the visible spectrum such as CFR610
  • the IS481 target nucleic acid sequence is amplified using a probe that is labeled with a fluorescein armdite fhiorophore such as FAM.
  • the signal for MS 1001 is detected via the JOE fhiorophore
  • the signal for IS1001 is detected via the CFR610 fhiorophore
  • the signal for IS 481 is detected via the FAM fhiorophore.
  • the presence or absence of pathogenic Bordetella species in a sample can be determined based on the following scenarios:
  • a sample with a detectable signal (FAM) for the IS481 target nucleic acid sequence but no detectable CFR610 signal for IS1001 and no detectable JOE signal for hIS 1001 is interpreted as containing B. pertussis only.
  • the present disclosure also provides kits for detecting target nucleic acid sequences corresponding to pathogenic Bordetella species.
  • Kits of the present technology comprise at least two oligonucleotides which may serve as primers or primer-probes for amplifying one or more multicopy insertion sequences selected from the group consisting of IS481, IS 1001 and hIS1001 to determine the presence of pathogenic Bordetella species in a biological sample.
  • kits of the present technology comprise a single primer pair that specifically hybridizes to a target nucleic acid of a single multicopy insertion sequence selected from the group consisting of IS481, ISIOOI and hIS1001.
  • the kits of the present technology comprise multiple primer pairs comprising a first primer pair that specifically hybridizes to a target nucleic acid for IS481, and a second primer pair that specifically hybridizes to a target nucleic acid for IS1001 or hIS1001.
  • kits of the present technology comprise multiple primer pairs comprising a first primer pair that specifically hybridizes to a target nucleic acid for IS1001, and a second primer pair that specifically hybridizes to a target nucleic acid for MSIOOI.
  • the kits of the present technology comprise multiple primer pairs comprising a first primer pair that specifically hybridizes to a target nucleic acid for IS481, a second primer pair that specifically hybridizes to a target nucleic acid for IS 1001, and a third primer pair that specifically hybridizes to a target nucleic acid for hIS1001.
  • the target nucleic acid for IS481 corresponds to SEQ ID NO: 1; the target nucleic acid for IS 1001 corresponds to SEQ ID NO: 2; and the target nucleic acid for hIS 1001 corresponds to SEQ ID NO: 3.
  • kits comprise a first primer pair mat is capable of specifically hybridizing to an IS481 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 1, or a complement thereof. Additionally or alternatively, the kits comprise a second primer pair mat is capable of specifically hybridizing to an IS 1001 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 2, or a complement thereof. Additionally or alternatively, the kits comprise a third primer pair that is capable of specifically hybridizing to a hIS1001 target nucleic acid comprising nucleotides that are at least 85-95% identical to SEQ ID NO: 3, or a complement thereof.
  • kits comprise one or more primer pairs selected from
  • kits comprise an internal control primer pair consisting of a forward primer comprising 5' GCTTCAGTACCTTCGGCTTG 3' (SEQ ID NO: 17), and a reverse primer comprising 5' TTGCAGGCATCTCTGACAAC 3 * (SEQ ID NO: 18).
  • kits provide a single nucleic acid probe that specifically hybridizes to a target nucleic acid of a single multicopy insertion sequence selected from the group consisting of IS481, IS1001 and hIS1001.
  • kits of the present technology comprise multiple nucleic acid probes comprising a first nucleic acid probe that specifically hybridizes to a target nucleic acid for IS481, and a second nucleic acid probe that specifically hybridizes to a target nucleic acid for IS 1001 or hIS1001.
  • the kits of the present technology comprise multiple nucleic acid probes comprising a first nucleic acid probe mat specifically hybridizes to a target nucleic acid for IS 1001 , and a second nucleic acid probe that specifically hybridizes to a target nucleic acid for hIS 1001.
  • kits of the present technology comprise multiple nucleic acid probes comprising a first nucleic acid probe that specifically hybridizes to a target nucleic acid for IS481, a second nucleic acid probe that specifically hybridizes to a target nucleic acid for IS 1001, and a third nucleic acid probe that specifically hybridizes to a target nucleic acid for hIS1001.
  • the first nucleic acid probe is capable of specifically hybridizing to a segment of the IS481 target nucleic acid of SEQ ID NO: 1 or a complement thereof, and is detectabry labeled with a fluorophore.
  • the second nucleic acid probe is capable of specifically hybridizing to a segment of the IS 1001 target nucleic acid of SEQ ID NO: 2 or a complement thereof, and is detectabry labeled with a fluorophore.
  • the third nucleic acid probe is capable of specifically hybridizing to a segment of the hIS1001 target nucleic acid of SEQ ID NO: 3 or a complement thereof and is detectabry labeled with a fluorophore.
  • kits comprise one or more nucleic acid probes selected from among 5' TCAATTXK!TGGACCATTTCGAGTCGAC 3 * (SEQ ID NO: 12) or a complement thereof (IS481 probe); 5' CAACCAGCCGCTGCTGACGGTC 3' (SEQ ID NO: 9) or a complement thereof (IS1001 probe); and 5' AGTCGCTGGCTACTGCTGCGCA 3' (SEQ ID NO: 6) or a complement thereof (hIS1001 probe). Additionally or aftematively, the kits comprise an internal control nucleic acid probe comprising 5'
  • the kit comprises liquid medium containing the at least one target-specific nucleic acid probe in a concentration of 250 nM or less.
  • the probes are provided in the required amount to perform reliable multiplex detection reactions according to t!ie present technology.
  • the target-specific nucleic acid probes are detectably labeled.
  • kits further comprise buffers, enzymes having polymerase activity, enzymes having polymerase activity and lacking 5'— >3' exomiclease activity or both 5'->3' and 3' ⁇ 5' exomiclease activity, enzyme cofactors such as magnesium or manganese, salts, chain extension nucleotides such as deoxynucleoside triphosphates (dNTPs), modified dNTPs, nuckase-resistant dNTPs or labeled dNTPs, necessary to carry out an assay or reaction, such as amplification and/or detection of target nucleic acid sequences corresponding to pathogenic Bordetella species.
  • enzymes having polymerase activity enzymes having polymerase activity and lacking 5'— >3' exomiclease activity or both 5'->3' and 3' ⁇ 5' exomiclease activity
  • enzyme cofactors such as magnesium or manganese
  • salts such as chain extension nucleotides such as deoxynucleoside triphosphates (dNT
  • kits of the present technology further comprise a positive control nucleic acid sequence and a negative control nucleic acid sequence to ensure the integrity of the assay during experimental runs.
  • a kit may further contain a means for comparing the copy number of one or more of 15481, IS 1001 and hIS1001 in a biological sample with a reference nucleic acid sample (e.g., a sample having a known copy number for one or more of IS481, IS 1001 and hIS1001).
  • the kit may also comprise instructions for use, software for automated analysis, containers, packages such as packaging intended for commercial sale and the like.
  • the kit may further comprise one or more of: wash buffers and/or reagents, hybridization buffers and/or reagents, labeling buffers and/or reagents, and detection means.
  • the buffers and/or reagents are usually optimized for the particular amplification/detection technique for which the kit is intended. Protocols for using these buffers and reagents for performing different steps of the procedure may also be included in the kit.
  • the kit additionally may comprise an assay definition scan card and/or
  • a kit comprises an amplification reaction mixture or an amplification master mix.
  • Reagents included in the kit may be contained in one or more containers, such as a vial.
  • Primers, probes, and/or primer-probes specific for amplification and detection of DNA internal control may be included in the amplification master mix as the target primer pairs to monitor potential PGR inhibition.
  • Reagents necessary for amplification and detection of targets and internal control may be formulated as an all-in-one amplification master mix, which may be provided as single reaction aliquots in a kit.
  • Nasopharyngeal swab samples are collected from patients. 50 uL of the unprocessed and undiluted nasal swab sample is loaded directly into a sample well of wedge 1 of a SIMPLEXA Direct Amplification Disc (Focus Diagnostics, Inc., Cypress, Calif., USA) without performing a separate front-end specimen preparation step.
  • SIMPLEXA Direct Amplification Disc Facus Diagnostics, Inc., Cypress, Calif., USA
  • Amplification master mix 50 uL of Amplification master mix is pipetted into the reaction well of wedge 1 of the disc, wherein the amplification master mix contains PCR buffer, DNA polymerase, dNTPs, magnesium chloride, potassium chloride, primers consisting of SEQ ID NOs: 4-5, 7- 8 and 10-11, probes consisting of SEQ ID NOs: 6, 9 and 12, and an internal control DNA fragment (SEQ ID NO: 13) and a primer pair and probe specific to the control fragment (SEQ ID NOs: 17-19).
  • the TaqMan probes consisting of SEQ ID NOs: 6, 12, 9, and 19 are labeled with JOE, FAM, CFR610 and Q670 respectively.
  • a positive control spiked with cultured BardeteUa pertussis, Bordetella parapertussis, and Bordetella hohnesii, and a negative control are included in the assay.
  • Hie wedge is scaled with foil and the Direct Amplification Disc is men inserted into a 3MTM Integrated Cycler (3M, St. Paul, Minn., USA) and Real-time PCR commences in the cycler.
  • the PCR cycling conditions include the following steps: i) sample pre-heat at 75° C, 300 seconds, 1 cycle ii) polymerase activation at 97° C, 120 seconds, 1 cycle, and iii) Denaturatkm at 97° C, 10 seconds and annealing at 56° C, 30 seconds for 40 cycles.
  • the specific fluorescent threshold concentrations of amplicons corresponding to IS481, IS 1001 and hIS1001 are set at 2000, 5000 and 2000 respectively.
  • Target genomic DNA is specifically amplified and simultaneously detected by fluorescent-labeled probes in the same reaction.
  • the presence of pathogenic Bordetella species is determined by the following algorithm, which provides the final results by evaluating cycle threshold (Ct) in the FAM, JOE and CFR610 channels.
  • Ct cycle threshold
  • Example 2 Limit of Detection of tb» Bordetella Multiplex Assay.
  • a Limit of Detection (LoD) study will be performed to determine the analytical sensitivity of the SimpkxaTM Bordetella Direct assay in nasopharyngeal swab matrices using quantified bacterial strains of B. pertussis, B. parapertussis and B. hobnesii. Each bacterial strain will be screened for presumptive LoD and subsequently confirmed. The LoD for each strain will be determined as the lowest concentration with >85-95% detection for 20 replicates (>19 out of 20 replicates detected).
  • Example 3 Cross-reactrvltv of the BordeteUa Multiple.. Assay.
  • ⁇ 40 is interpreted as a positive result for B. parapertussis cross-reactivity, and a Ct value of
  • ⁇ 40 is interpreted as a positive result for B. hohnesii cross-reactivity.
  • a range includes each individual member.
  • a group having 1-3 cells refers to groups having 1, 2, or 3 cells.
  • a group having 1-5 cells refers to groups having 1, 2, 3, 4, or 5 cells, and so forth.

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Abstract

La présente invention concerne des méthodes pour déterminer si un patient qui présente des symptômes de type coqueluche bénéficiera d'un traitement, avec des agents thérapeutiques qui inhibent la bactérie Bordetella holmesii. Ces méthodes sont basées sur la détection de Bordetella pertussis, Bordetella parapertussis, et Bordetella holmesii dans un échantillon biologique par analyse de la présence des éléments de répétition cibles IS481, IS 1001 et hIS1001, respectivement. L'invention concerne également des kits à utiliser pour la mise en pratique de ces méthodes.
PCT/US2017/023735 2016-03-24 2017-03-23 Méthodes de détection de bordetella WO2017165599A1 (fr)

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CN201780031481.4A CN109153699A (zh) 2016-03-24 2017-03-23 用于检测博德特氏菌属的方法
EP17771121.5A EP3442984B1 (fr) 2016-03-24 2017-03-23 Méthodes de détection debordetella
EP22189467.8A EP4144867A1 (fr) 2016-03-24 2017-03-23 Méthodes de détection debordetella
CA3018843A CA3018843A1 (fr) 2016-03-24 2017-03-23 Methodes de detection de bordetella
US16/086,714 US20190382826A1 (en) 2016-03-24 2017-03-23 Methods for detecting bordetella
BR112018069316A BR112018069316A2 (pt) 2016-03-24 2017-03-23 métodos para detectar presença de pelo menos uma espécie de bordetella patogênica e selecionar um paciente que exibe sintomas semelhantes à coqueluche, e, kit para detectar presença de pelo menos uma espécie de bordetella patogênica.
MX2018011625A MX2018011625A (es) 2016-03-24 2017-03-23 Metodos para detectar bordetella.

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110468223A (zh) * 2019-09-26 2019-11-19 北京卓诚惠生生物科技股份有限公司 基于dUTP/UNG法的肺炎支原体和鲍特菌属核酸检测的引物、探针、试剂盒及方法
WO2020151671A1 (fr) * 2019-01-23 2020-07-30 Glycolysis Biomed Co., Ltd Composés de bêta-lactame ou leurs sels destinés à être utilisés dans la prévention ou le traitement à action prolongée d'un trouble du métabolisme du glucose
WO2020069085A3 (fr) * 2018-09-27 2020-10-01 Gen-Probe Incorporated Compositions et procédés de détection d'acides nucléiques de bordetella pertussis et de bordetella parapertussis
RU2811476C2 (ru) * 2019-01-23 2024-01-12 Гликолисис Биомед Ко., Лтд Бета-лактамные соединения или их соли для применения в долгосрочном предотвращении или лечении нарушения метаболизма глюкозы

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11215573B2 (en) * 2016-01-14 2022-01-04 Jamlet MONASELIDZE Differential scanning microcalorimeter device for detecting disease and monitoring therapeutic efficacy
CN113373143A (zh) * 2021-07-13 2021-09-10 国药(武汉)医学实验室有限公司 一种用于副百日咳鲍特菌检测探针、试剂盒及其使用方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080254062A1 (en) * 2007-02-23 2008-10-16 The Penn State Research Foundation Use of an avirulent bordetella mutant as a live vaccine vector
WO2009055239A1 (fr) * 2007-10-26 2009-04-30 Quest Diagnostics Investments Incorporated Dosage de détection de bordetella
WO2010124281A2 (fr) 2009-04-24 2010-10-28 The Goverment Of The Usa, As Represented By The Secretary, Department Of Health And Human Services,Centres For Disease Control And Prevention Détection sélective d'espèces de bordetella
WO2015066530A1 (fr) * 2013-10-31 2015-05-07 Atherotech, Inc. Procédés d'amplification d'acides nucléiques

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108866169A (zh) * 2011-07-06 2018-11-23 探索诊断投资公司 病毒和细菌病原体的直接扩增和检测
MX353878B (es) * 2011-10-04 2018-02-01 Genera Biosystems Ltd Composiciones y metodos de patogenos de deteccion respiratoria utilizando sondas de acido nucleico y subconjuntos de perlas.
NZ732886A (en) * 2014-11-25 2023-06-30 Quest Diagnostics Invest Llc Amplification and detection of nucleic acids in a biological sample

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080254062A1 (en) * 2007-02-23 2008-10-16 The Penn State Research Foundation Use of an avirulent bordetella mutant as a live vaccine vector
WO2009055239A1 (fr) * 2007-10-26 2009-04-30 Quest Diagnostics Investments Incorporated Dosage de détection de bordetella
WO2010124281A2 (fr) 2009-04-24 2010-10-28 The Goverment Of The Usa, As Represented By The Secretary, Department Of Health And Human Services,Centres For Disease Control And Prevention Détection sélective d'espèces de bordetella
WO2015066530A1 (fr) * 2013-10-31 2015-05-07 Atherotech, Inc. Procédés d'amplification d'acides nucléiques

Non-Patent Citations (8)

* Cited by examiner, † Cited by third party
Title
"Genbank", Database accession no. AB473 880.1
ANTILA ET AL.: "Bordetella holmesii DNA is not detected in nasopharyngeal swabs from Finnish and Dutch patients with suspected pertussis", J MED MICROBIOL., vol. 55, 1 August 2006 (2006-08-01), pages 1043 - 51, XP055426111 *
HOPPE JE., PEDIATR INFECT DIS J, vol. 18, 1999, pages 375 - 81
MANSFIELD, MOL. CELL PROBES, vol. 9, 1995, pages 145 - 156
MATTOO ET AL., CLIN. MICROBIOL. REV., vol. 18, 2005, pages 326 - 382
MORTENSEN ET AL.: "In vitro activity of gemifloxacin and other antimicrobial agents against isolates of Bordetella pertussis and Bordetella parapertussis", JOURNAL OF ANTIMICROBIAL CHEMOTHERAPY, vol. 45, no. Suppl. S1, 1 April 2000 (2000-04-01), pages 47 - 49, XP055426114 *
PITTET ET AL., PLOS ONE, vol. 9, no. 2, 2014, pages e88936
See also references of EP3442984A4

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020069085A3 (fr) * 2018-09-27 2020-10-01 Gen-Probe Incorporated Compositions et procédés de détection d'acides nucléiques de bordetella pertussis et de bordetella parapertussis
WO2020151671A1 (fr) * 2019-01-23 2020-07-30 Glycolysis Biomed Co., Ltd Composés de bêta-lactame ou leurs sels destinés à être utilisés dans la prévention ou le traitement à action prolongée d'un trouble du métabolisme du glucose
CN113423405A (zh) * 2019-01-23 2021-09-21 醣解生医股份有限公司 β-内酰胺类化合物或其盐用于长效预防或治疗葡萄糖代谢失调的用途
TWI820289B (zh) * 2019-01-23 2023-11-01 醣解生醫股份有限公司 β-內醯胺類化合物或其鹽於長效預防或治療葡萄糖代謝失調之用途
RU2811476C2 (ru) * 2019-01-23 2024-01-12 Гликолисис Биомед Ко., Лтд Бета-лактамные соединения или их соли для применения в долгосрочном предотвращении или лечении нарушения метаболизма глюкозы
CN110468223A (zh) * 2019-09-26 2019-11-19 北京卓诚惠生生物科技股份有限公司 基于dUTP/UNG法的肺炎支原体和鲍特菌属核酸检测的引物、探针、试剂盒及方法

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EP3442984A1 (fr) 2019-02-20
CA3018843A1 (fr) 2017-09-28
BR112018069316A2 (pt) 2019-01-22
MX2022014741A (es) 2023-01-11
CN109153699A (zh) 2019-01-04
US20190382826A1 (en) 2019-12-19

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